我有一张桌子，看起来像：
class Tld(models.Model):
domainNm = models.CharField(validators=[ RegexValidator('^[0-9]^[a-z]','yourdomain.com only','Invalid Entry')], max_length=40)
dtCreated = models.DateField()
对于 domainNm - 我想验证任何看起来像的条目：
它必须遵循这种方式：<domainname>.[com|biz|net]等等并且是字母数字。
如何在 django 模型的模型级别上执行此操作？
谢谢
如果您想验证 HTTP URL，请忘记正则表达式并使用内置验证器。
如果您只想要没有任何协议的域，请尝试：
def full_domain_validator(hostname):
"""
Fully validates a domain name as compilant with the standard rules:
- Composed of series of labels concatenated with dots, as are all domain names.
- Each label must be between 1 and 63 characters long.
- The entire hostname (including the delimiting dots) has a maximum of 255 characters.
- Only characters 'a' through 'z' (in a case-insensitive manner), the digits '0' through '9'.
- Labels can't start or end with a hyphen.
"""
HOSTNAME_LABEL_PATTERN = re.compile("(?!-)[A-Z\d-]+(?<!-)$", re.IGNORECASE)
if not hostname:
return
if len(hostname) > 255:
raise ValidationError(_("The domain name cannot be composed of more than 255 characters."))
if hostname[-1:] == ".":
hostname = hostname[:-1] # strip exactly one dot from the right, if present
for label in hostname.split("."):
if len(label) > 63:
raise ValidationError(
_("The label '%(label)s' is too long (maximum is 63 characters).") % {'label': label})
if not HOSTNAME_LABEL_PATTERN.match(label):
raise ValidationError(_("Unallowed characters in label '%(label)s'.") % {'label': label})
用法：
from django.core.validators import URLValidator
field = models.CharField(_('host name'), max_length=255, validators=[URLValidator])
或者
field = models.CharField(_('host name'), max_length=255, validators=[full_domain_validator])
To recap the clarifications above: You want to match only domains with a single alphanumeric label and a TLD of up to 4 characters, eg. "domain.com" or "someotherdomain.info" or "345xyz.pdq1" but not "subdomain.domain.com", "http://domain.com", "www.domain.com", or "345xyz.abcde". This regex will do it:
^[a-z0-9]+\.[a-z0-9]{1,4}$